So, I'm thinking that I may have a common issue on my treg. I've changed both temp sensors. One on the plastic pipe at the rear of the engine, and the other at the outlet of the radiator. I cleared the codes and it worked fine until the second ski trip. Now the coolant overheating displays with the temperature gauge holding at 200 degrees, but the oil temp gauge works intermittently... off then up to 160, then off. the fans continue to run after I shut it off and the next morning I start it up and they again sound like turbins. Kinda lost on this now and usually when I take it in to the dealer, it comes back in a lot worse shape than was before! I have had this car for over eight years and am the second owner. Any ideas out there?